Jennifer Aniston says appearing in 'Friends' is one of the "greatest things" she's ever done.

The 'Horrible Bosses' actress played Rachel Green for 10 years until 2004, and while she doesn't think there will be a reunion, she knows all the cast have fond memories of the sitcom.

Jennifer - who starred alongside Courteney Cox, Lisa Kudrow, Matt LeBlanc, Matthew Perry and David Schwimmer - said: "'Friends' is there all the time, especially in the UK. It gave us so much. It was one of the greatest things we all ever did, and it might very well be one of the greatest jobs we'll ever have."

The 42-year-old beauty - who was in London yesterday (20.07.11) to attend the European premiere of 'Horrible Bosses' - also revealed how she is now much calmer than she was when she was in 'Friends', which puts down to being older.

Speaking on UK TV show 'Daybreak', she said: "Most women I know do (feel calmer), to tell you the truth. I mean, how they always say youth is wasted on the young because there's something about being in your twenties where you're sort of wide-eyed and bushy tailed and there's something you just haven't quite gotten a grasp of. And everybody had said to me when you hit 40 you're just going to feel a complete calm, and it's true."